What is A mutation that involves changes in the number or structure of chromosomes is a?

A mutation that involves changes in the number or structure of chromosomes is called a chromosomal mutation. This type of mutation can result in deletions, duplications, inversions, or translocations of chromosome segments. Chromosomal mutations can lead to genetic disorders or contribute to the evolution of species by altering genetic material. They can occur during cell division, particularly during meiOSis or mitosis.